It's been out there for years - an excerpt says a lot:
The sheer volume of data stolen by Sinowal is extraordinary
Just a single Trojan, operated by just one group of fraudsters, has been able to infect hundreds of thousands of computers, compromising and stealing information from their users’ accounts.
The compromised data belongs to customers of hundreds of financial institutions within many regions of the world. We have seen affected financial institutions within North America (both the United States and Canada), Europe (United Kingdom, France, Spain, Germany, the Netherlands, Italy and others), Asia Pacific (Australia, China, Malaysia, and others) as well as some countries in Latin America. However, we found that no Russian accounts were compromised by Sinowal.
In the past six months alone, the Sinowal Trojan has compromised and stolen login credentials and other information of more than 100,000 online bank accounts.